Fotospeed say : Platinum Baryta 300 is a 100% acid free, Fine Art paper with a smooth unglazed gloss surface. A natural white base and state of the art micro-porous ink receiving layer delivers a high D-MAX (2.7) and wide colour gamut. Platinum Baryta 300 reveals delicate highlights and smooth transitions to shadows for both colour and B&W printing. The paper is approved by the Fine Art Trade Guild and when used in conjunction with pigment inks will ensure a print life of more than 85 years. Compatible with both dye and pigment inks.